But some advertisers are claiming, at least on the AdSense side, the display URLs are sometimes being converted to all caps. One said:

I was quite surprised last night to see an ad on my gmail account where the display URL was in all CAPS.

In fact, many advertisers continue to enter the display URLs for their ads in various cases just in case Google changes their mind. Another advertiser explained, "I still cap words in the URL. You never know, they might change their minds about it."